EP2552624B1 - Fahrzeugrad aus einer geformten aluminiumlegierung mit stilisierter struktur, verfahren zur herstellung eines derartigen rads und bei diesem verfahren verwendete form - Google Patents

Fahrzeugrad aus einer geformten aluminiumlegierung mit stilisierter struktur, verfahren zur herstellung eines derartigen rads und bei diesem verfahren verwendete form Download PDF

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Publication number
EP2552624B1
EP2552624B1 EP11714357.8A EP11714357A EP2552624B1 EP 2552624 B1 EP2552624 B1 EP 2552624B1 EP 11714357 A EP11714357 A EP 11714357A EP 2552624 B1 EP2552624 B1 EP 2552624B1
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EP
European Patent Office
Prior art keywords
wheel
pattern
ridges
reproduced
mould
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP11714357.8A
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English (en)
French (fr)
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EP2552624A1 (de
Inventor
Thomas Banctel
Robert Matthews
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PSA Automobiles SA
Original Assignee
Peugeot Citroen Automobiles SA
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Publication date
Application filed by Peugeot Citroen Automobiles SA filed Critical Peugeot Citroen Automobiles SA
Publication of EP2552624A1 publication Critical patent/EP2552624A1/de
Application granted granted Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/22—Moulds for peculiarly-shaped castings
    • B22C9/28—Moulds for peculiarly-shaped castings for wheels, rolls, or rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/06—Permanent moulds for shaped castings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D18/00—Pressure casting; Vacuum casting
    • B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B1/00—Spoked wheels; Spokes thereof
    • B60B1/06—Wheels with compression spokes
    • B60B1/08—Wheels with compression spokes formed by casting

Definitions

  • the present invention relates to a vehicle wheel, particularly a motor vehicle wheel, and more particularly to a cast aluminum alloy wheel having a style pattern made in the same molding process as the wheel, as disclosed in FIG. EP2145708A and corresponding to the preamble of claim 1.
  • Such wheels are conventionally made from a low-pressure molding process of a liquid aluminum alloy.
  • a wheel by its rim (the peripheral part of the wheel), the hub (the central part of the wheel) and the spokes of wheel or arm (the parts connecting the rim to the hub) which participate in the style of the wheel.
  • the general shapes of the aluminum alloy wheel arms represent generally smooth surfaces with at most one streak.
  • the shape tolerance on a low pressure molded surface is ⁇ 0.8mm.
  • the present invention relates to an aluminum alloy wheel whose visible face, or face of style, comprises a pattern consisting of a succession of streaks of small dimensions and small depths, obtained thanks to a single controlled low pressure molding operation and reproducible.
  • the layout and fineness of the streaks are important to optimize the stylistic effect of the wheel.
  • Document is also known CN104450439 , a method of manufacturing an aluminum alloy wheel using a mold in which is cast the liquid aluminum alloy and an extrusion means for creating the final outer shape of the wheel.
  • None of these documents discloses a molding process for obtaining in a single molding operation, a pattern consisting of a succession of striations on the wheel face of the wheel, and whose dimensions are of the same order of magnitude as the typical shape tolerances obtained with a low pressure molding process of ⁇ 0.8mm.
  • the invention firstly relates to an aluminum alloy wheel, in particular a motor vehicle wheel, comprising at least one style pattern reproduced on at least one face of the wheel, said wheel being characterized in that the pattern comprises a plurality of parallel successive streaks extending in a substantially circumferential direction with respect to the center of the wheel and whose dimensions are of the same order of magnitude as the shape tolerances obtained with a low pressure molding process; the wheel and the pattern with successive striations being made by a single low-pressure molding operation.
  • the streaks have a maximum depth of 0.8 mm with a minimum radius at the top of 2 mm.
  • the distance separating a vertex from a groove cavity is between about 2.3 mm and 2.7 mm for a connection angle of a vertex to a hollow respectively between about 145 ° and 155 ° .
  • the invention also relates to a wheel according to that described above, comprising a peripheral portion called a rim and a central part called hub, and a plurality of spokes called arms, connecting the rim to the hub, said wheel being characterized in that that the pattern is reproduced on at least one first end face of at least one arm of the wheel.
  • the front face of the arm comprises a flare whose width increases progressively from a determined distance from the hub to the rim; the pattern with successive streaks being reproduced on this flare.
  • the striations completely cover said flare.
  • the number of arms is even and the pattern with successive streaks is reproduced and repeated on one arm out of two.
  • the pattern with successive striations extends on a second face of the arm which is substantially perpendicular to the first end face.
  • the subject of the invention is also a mold used by the above method, for the low-pressure molding of the wheel described above, said mold being characterized in that it comprises a negative profile of the striations whose dimensions are of the order of low pressure aluminum alloy casting tolerances, with clearance angles of at least 7 °.
  • FIGS. 1 and 2 respectively illustrate a front view of an aluminum alloy wheel 1 having a pattern 2 made on the visible face, or front face 23 of the wheel 1, also referred to as the "face style".
  • This wheel 1 comprises a rim 11, corresponding to the peripheral part of the wheel 1 intended to support a tire, a hub 12 corresponding to the central part of the wheel 1, and a plurality of spokes 13, also called arms, extending radially between the rim 11 and the hub 12.
  • the wheel 1 may comprise a variable number of arms 13 which may be even or odd.
  • the number of arms 13, the shape and the dimensions of the arms 13 are highly variable from one aluminum wheel to another.
  • the choice of wheels and thus the style of the wheels is either offered by OEMs or aftermarket by wheel manufacturers.
  • the wheels greatly contribute to the overall style of the vehicle.
  • the appearance of the wheels becomes a distinctive sign of a vehicle model or even a car brand.
  • the number of streaks 21 must be sufficient to obtain the desired style effect, which imposes a depth and ray striations 21 very precise.
  • the dimensions satisfying the requirements of style are at the limit of the dimensional tolerances of the parts obtained by low pressure foundry: the desired dimensioning for the grooves 21 being of substantially the same order of magnitude as the shape tolerances of the parts made of cast aluminum.
  • Another constraint related to the molding is to be able to remove the wheel 1 from the mold after the molding operation.
  • the optimal dimensions of the streaks 21 of the Pattern 2 according to the invention were precisely determined to arrive at the following dimensioning: the depth of the streaks is 0.8 mm and the minimum radius of the streaks is 2 mm.
  • the orientation of the streaks 21 was determined to be able to unmold the wheel 1 without difficulty.
  • the grooves 21 extend in a substantially circumferential direction relative to the center of the wheel 1 with clearance angles with respect to the axis of the wheel at least 7 °.
  • the style effect is also accentuated by the particular arrangement and repetition of the same pattern 21 on the arms 13.
  • the same pattern 21 can be reproduced on all the arms 13 or on one arm 2 in two when the number of arms 13 is even.
  • the pattern 2 may also be reproduced on one or on both faces 23, 24 of an arm 13.
  • the arm 13 has a flare 22 whose width increases gradually from a distance from the hub 12 to the rim 11 following a gentle curvature (or curve) extending in a substantially radial direction.
  • Pattern 2 is reproduced on this flare 22.
  • the length of streaks 21 lengthens gradually following the gradual widening of the flare 22.
  • the figure 3 illustrates, in a detail view in radial section of the wheel 1, the pattern 2 successive streaks 21, obtained after low pressure molding respecting the dimensional and control constraints imposed above.
  • the crest line passing through the succession of grooves 21 defines a wavy line (or flattened sinusoid) 5 after successive application of a primer, a paint and a varnish.
  • Each of the layers having a thickness of the order of a hundred microns.
  • the depth P of the ridges 21 is materialized by the distance separating the two lines passing respectively through the recesses 61 and the vertices 62 of the ridges 21. This depth P is at most 0.8 mm.
  • the radius R of a groove 21, considered at its top 62, is at least 2 mm.
  • the distance D separating a recess 61 from an adjacent vertex 62 is between 2.3 mm and 2.7 mm respectively corresponding to a connecting radius between a recess 61 and an adjacent apex 62 of 145 ° to 155 °.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Forging (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Claims (10)

  1. Rad (1) aus einer Aluminiumlegierung, vor allem ein Kraftfahrzeugrad, umfassend zumindest ein Stilmotiv (2), das auf zumindest einer Seite (23) des Rades (1) abgebildet ist, dadurch gekennzeichnet, dass das Motiv (2) eine Vielzahl von aufeinander folgenden parallelen Riefen (21) umfasst, die sich in eine im Verhältnis zur Radmitte (1) in etwa umlaufende Richtung erstrecken, und deren Abmessungen dieselbe Größenordnung aufweisen, wie die Formtoleranzen, die man mit einem Niederdruckformverfahren erhält; Rad (1) und Motiv (2) mit den aufeinander folgenden Riefen (21) werden dabei durch ein und denselben Niederdruckformvorgang erzeugt.
  2. Rad (1) nach dem vorherigen Anspruch, dadurch gekennzeichnet, dass die Riefen (21) eine maximale Tiefe (P) von 0,8 mm mit einem Mindestradius (R) am Scheitel (62) von 2 mm aufweisen.
  3. Rad (1) nach dem vorherigen Anspruch, dadurch gekennzeichnet, dass der Abstand (D) zwischen einem Scheitel (62) und einer Mulde (61) der Riefe (21) zwischen etwa 2,3 mm und 2,7 mm liegt, bei einem Verbindungswinkel zwischen einem Scheitel (62) und einer Mulde (61) jeweils zwischen etwa 145° und 155°.
  4. Rad (1) nach einem der vorherigen Ansprüche, umfassend einen peripheren Abschnitt, der Felge (11) genannt wird, und einen mittleren Abschnitt, der Nabe (12) genannt wird, sowie eine Vielzahl von Speichen, die Arme (13) genannt werden, die die Felge (11) mit der Nabe (12) verbinden, dadurch gekennzeichnet, dass das Motiv (2) auf zumindest einer ersten Vorderseite (23) zumindest eines Armes (13) des Rades (1) abgebildet ist.
  5. Rad (1) nach dem vorherigen Anspruch, dadurch gekennzeichnet, dass die Vorderseite (23) des Armes (13) eine Aufweitung (22) umfasst, deren Breite sich progressiv ab einem bestimmten Abstand von der Nabe (12) bis zur Felge (11) vergrößert; das Motiv (2) mit aufeinander folgenden Riefen (21) wird dabei auf dieser Aufweitung (22) abgebildet.
  6. Rad (1) nach dem vorherigen Anspruch, dadurch gekennzeichnet, dass die Riefen (21) die besagte Aufweitung (22) vollständig bedecken.
  7. Rad (1) nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, dass die Anzahl der Arme (13) eine gerade Zahl ist, und dadurch, dass das Motiv (2) mit den aufeinander folgenden Riefen (21) auf jedem zweiten Arm (13) abgebildet und wiederholt wird.
  8. Rad (1) nach einem der Ansprüche 4 bis 7, dadurch gekennzeichnet, dass sich das Motiv (2) mit den aufeinander folgenden Riefen (21) auf einer zweiten Seite (24) des Armes (13) fortsetzt, die in etwa senkrecht zur ersten Vorderseite (23) verläuft.
  9. Verfahren zum Erhalt eines Rades (1) nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass es darin besteht:
    - eine flüssige Aluminiumlegierung zum Niederdruckformen des Rades (1) in eine Form zu füllen; die Form enthält dabei das negative Profil des Motivs (2) mit den aufeinander folgenden Riefen (21) und unter Berücksichtigung der Freiwinkel von mindestens 7°;
    - das Rad (1) aus der Form zu nehmen;
    - die Abmessungen der Riefen (21) zu prüfen, die man nach dem Formen des Rades (1) vor jeder Bearbeitung erhält; und
    - regelmäßig den Verschleißzustand der Form vor einer neuen Radformung (1) zu prüfen.
  10. Form, die vom Verfahren nach dem vorherigen Anspruch für das Niederdruckformen des Rades (1) nach einem der Ansprüche 1 bis 8 verwendet wird, dadurch gekennzeichnet, dass sie ein negatives Profil der Riefen (21) umfasst, dessen Abmessungen dieselbe Größenordnung aufweisen, wie die Formtoleranzen, die man mit einem Niederdruckformverfahren erhält, mit Freiwinkeln von mindestens 7°.
EP11714357.8A 2010-03-31 2011-03-16 Fahrzeugrad aus einer geformten aluminiumlegierung mit stilisierter struktur, verfahren zur herstellung eines derartigen rads und bei diesem verfahren verwendete form Active EP2552624B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1052383A FR2958212B1 (fr) 2010-03-31 2010-03-31 Roue de vehicule en alliage d'aluminium moule comportant un motif de style, procede d'obtention d'une telle roue et moule utilise par le procede
PCT/FR2011/050526 WO2011124796A1 (fr) 2010-03-31 2011-03-16 Roue de vehicule en alliage d'aluminium moule comportant un motif de style, procede d'obtention d'une telle roue et moule utilise par le procede

Publications (2)

Publication Number Publication Date
EP2552624A1 EP2552624A1 (de) 2013-02-06
EP2552624B1 true EP2552624B1 (de) 2014-02-26

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EP11714357.8A Active EP2552624B1 (de) 2010-03-31 2011-03-16 Fahrzeugrad aus einer geformten aluminiumlegierung mit stilisierter struktur, verfahren zur herstellung eines derartigen rads und bei diesem verfahren verwendete form

Country Status (5)

Country Link
EP (1) EP2552624B1 (de)
CN (1) CN102939175B (de)
ES (1) ES2454891T3 (de)
FR (1) FR2958212B1 (de)
WO (1) WO2011124796A1 (de)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR797491A (fr) * 1935-01-28 1936-04-27 Perfectionnements aux roues pourvues de freins
JPS6012306A (ja) 1983-06-30 1985-01-22 Hashimoto Forming Co Ltd ホイ−ルカバ−の成形型
CN2158314Y (zh) * 1993-02-19 1994-03-09 中国兵器工业第五二研究所宁波分所 铝合金车轮的挤压铸造设备
JP4390787B2 (ja) * 2006-06-22 2009-12-24 トピー工業株式会社 加飾アルミホイール
US8140787B2 (en) * 2007-10-05 2012-03-20 Imation Corp. Methods for implementation of an active archive in an archiving system and managing the data in the active archive
CN101288901B (zh) * 2008-05-30 2010-11-17 青岛联鑫机械有限公司 子午线轮胎活络模具钢铝复合花纹块铸造成型方法
DE102008034189B3 (de) * 2008-07-16 2010-05-12 Felix Aschwanden Fahrzeugrad oder Radstern hierfür
CN104450439A (zh) 2014-11-18 2015-03-25 马鞍山市心洲葡萄专业合作社 一种海藻柠檬酒

Also Published As

Publication number Publication date
EP2552624A1 (de) 2013-02-06
WO2011124796A1 (fr) 2011-10-13
CN102939175A (zh) 2013-02-20
FR2958212A1 (fr) 2011-10-07
CN102939175B (zh) 2016-08-03
ES2454891T3 (es) 2014-04-11
FR2958212B1 (fr) 2012-04-20

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